Weather Alerts for California

Your Recent Locations:  Los Angeles, CA  
Current Alerts for Los Angeles, CA: High Surf Advisory

1. Lake Wind Advisory for: Greater Lake Tahoe Area

2. High Wind Warning for: Mono

3. Winter Weather Advisory for: Western Siskiyou County

4. Avalanche Watch for: Greater Lake Tahoe Area

5. Winter Weather Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties

6. Winter Storm Warning for: Greater Lake Tahoe Area

7. Winter Weather Advisory for: Del Norte Interior

8. Winter Weather Advisory for: Northern Humboldt Interior; Southern Humboldt Interior

9. Winter Weather Advisory for: Northern Trinity

10. Winter Weather Advisory for: Southern Trinity

11. Winter Storm Warning for: West Slope Northern Sierra Nevada; Western Plumas County, Lassen Park

12. Winter Weather Advisory for: Mountains Southwestern Shasta County to Northern Lake County; Shasta Lake Area, Northern Shasta County

13. High Surf Advisory for: Orange County Coastal; San Diego County Coastal Areas

14. High Wind Warning for: Central Siskiyou County

15. Wind Advisory for: Central Siskiyou County

16. Wind Advisory for: Modoc County

17. High Surf Advisory for: San Luis Obispo County Central Coast; Santa Barbara County Central Coast

18. High Surf Advisory for: Catalina and Santa Barbara Islands; Los Angeles County Coast including Downtown Los Angeles; Ventura County Coast

19. High Surf Warning for: San Luis Obispo County Central Coast; Santa Barbara County Central Coast

20. High Surf Warning for: Coastal North Bay Including Point Reyes National Seashore; San Francisco; San Francisco Peninsula Coast

21. High Surf Warning for: Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast

22. High Surf Warning for: Coastal Del Norte; Mendocino Coast; Northern Humboldt Coast; Southwestern Humboldt

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

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Todays National Weather Map

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North American Water Vapor Map

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

precipitation Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow